/* ------------------------------------------- */
/* 0. CSS Variables & Base Styles              */
/* ------------------------------------------- */
:root {
    /* Colors (Reused from previous requirement) */
    --primary: #ff3c3c; /* Red */
    --secondary: #ffffff; /* White */
    --text: #333;
    --dark-bg: #1f1f1f;
    --light-bg: #f7f7f7;
    --accent-dark: #cc3030; /* Darker primary for hover */

    /* Spacing */
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius: 10px;

    /* Transitions */
    --transition-speed: 0.3s;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Arial', sans-serif;
    color: var(--text);
    background-color: var(--secondary);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-speed);
}

a:hover, a:focus {
    color: var(--accent-dark);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Responsive Typography using clamp() */
h1 { font-size: clamp(2.2rem, 6vw + 1rem, 4rem); }
h2 { font-size: clamp(1.8rem, 4vw + 1rem, 3rem); margin-bottom: var(--spacing-md); }
h3 { font-size: clamp(1.4rem, 3vw + 1rem, 1.8rem); }

.section-heading {
    text-align: center;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    color: var(--primary);
    text-transform: uppercase;
    font-weight: 700;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.25rem;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: bold;
    text-align: center;
    transition: background-color var(--transition-speed), transform 0.1s, box-shadow var(--transition-speed);
    text-transform: uppercase;
    display: inline-block;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--secondary);
}

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* ------------------------------------------- */
/* 1. HEADER (Sticky and Responsive)           */
/* ------------------------------------------- */
.main-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--secondary);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
    width: 100%;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.logo img {
    height: 35px; /* Mobile size */
    width: auto;
}

/* Mobile Navigation (Default) */
.main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--secondary);
    border-top: 1px solid var(--light-bg);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-speed) ease-in-out;
}

.main-nav.open {
    max-height: 500px;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md) 0;
}

.nav-list li a {
    display: block;
    padding: 0.75rem var(--spacing-lg);
    border-bottom: 1px solid var(--light-bg);
    color: var(--text);
    font-weight: 500;
}

.nav-list li a:hover, .nav-list li a:focus {
    background-color: var(--light-bg);
    color: var(--primary);
}

.hamburger {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--primary);
    cursor: pointer;
    padding: 0.25rem;
    transition: transform var(--transition-speed);
}
.hamburger[aria-expanded="true"] {
    transform: rotate(90deg);
}

/* ------------------------------------------- */
/* ABOUT US SECTION STYLES                     */
/* ------------------------------------------- */
.about-section {
    padding: 0 0 var(--spacing-xl);
    background-color: var(--light-bg);
}

/* Company Overview Grid */
.about-overview-grid {
    display: flex;
    flex-direction: column; /* Stacks on mobile */
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: var(--secondary);
    border-radius: var(--radius);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.overview-text h2 {
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.overview-image img {
    width: 100%;
    border-radius: var(--radius);
    object-fit: cover;
}

.about-btn {
    margin-top: var(--spacing-md);
}

/* Mission & Values Grid */
.values-grid {
    display: grid;
    grid-template-columns: 1fr; /* 1 column on mobile */
    gap: var(--spacing-lg);
    text-align: center;
    padding: var(--spacing-lg) 0;
}

.value-card {
    background-color: var(--secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    border-top: 4px solid var(--primary);
    transition: transform 0.2s;
}

.value-card:hover {
    transform: translateY(-3px);
}

.value-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.value-card h3 {
    margin-bottom: var(--spacing-sm);
}

/* Team Section */
.team-section {
    text-align: center;
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-lg);
}

.team-member-card {
    max-width: 300px;
    margin: var(--spacing-md) auto;
    padding: var(--spacing-lg);
    background-color: var(--secondary);
    border-radius: var(--radius);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.team-member-card img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto var(--spacing-md);
    border: 3px solid var(--primary);
}

.team-quote {
    font-style: italic;
    color: #666;
    margin-top: var(--spacing-sm);
}

/* FOOTER (Simplified) */
.main-footer {
    background-color: var(--dark-bg);
    color: var(--secondary);
    padding: var(--spacing-md) 0;
    text-align: center;
    font-size: 0.9rem;
}

/* ------------------------------------------- */
/* MEDIA QUERIES (Breakpoints)                 */
/* ------------------------------------------- */

/* Tablet (768px and up) */
@media screen and (min-width: 768px) {
    /* HEADER: Desktop/Tablet Nav */
    .logo img { height: 40px; }
    .hamburger { display: none; }
    .main-nav { 
        position: static; max-height: none; overflow: visible; 
        border-top: none; width: auto; 
    }
    .nav-list { flex-direction: row; gap: var(--spacing-md); padding: 0; }
    .nav-list li a { padding: 0.5rem 0.75rem; border-bottom: none; }
    .nav-list li a:hover, .nav-list li a:focus { border-bottom: 2px solid var(--primary); background-color: transparent; }

    /* ABOUT US: Overview Grid */
    .about-overview-grid {
        flex-direction: row;
        align-items: center;
    }
    .overview-text, .overview-image {
        flex: 1;
    }
    .overview-image {
        order: 2; /* Image on the right */
    }

    /* ABOUT US: Values Grid */
    .values-grid {
        grid-template-columns: repeat(3, 1fr); /* 3 columns on tablet/desktop */
    }
}

/* Desktop (1024px and up) */
@media screen and (min-width: 1024px) {
    .logo img {
        height: 50px;
    }
}